Poul, contact Samui Ocean Sports on the island of Ko Samui in Thailand, http://www.sailing-in-samui.com/index.html
Ask for Kunta (he's German and his given name sounds a lot like Kunta Kente of "Roots" so he got stuck with it). I went on a Hobie Safari with him in 2003 using an 18 and a 21 with a 26 ft. chase boat, and exactly what you describe you want. I don't know if he still offers Hobie safaris so ask.
Here's another outfit in Ko Samui, but I can't vouch for them: http://www.travel.reperages-thailand.co ... 10_en.html
And another: http://samui-catamaran.com/en
February is Thailand's high season, but it's worth it - highs in the 80's, little to no rain, and the food! The Thai food you get in the US doesn't come close to how good it is there.